/* On SNB platform, before reading ring registers forcewake bit * must be set to prevent GT core from power down and stale values being * returned. */ /* * Generally this is called implicitly by the register read function. However, * if some sequence requires the GT to not power down then this function should * be called at the beginning of the sequence followed by a call to * gen6_gt_force_wake_put() at the end of the sequence. */